I'd be curious if it robs it of some benefits, though. The process you describe above sounds like it might actually be beneficial in an "antifragile" kind of way.

That is, there are benefits to be had by knowing you do work on multiple toolchains. Painful at times, but mainly in ways that make a better product.

I don't know how the Chromium project is set up, but another way to achieve that benefit is to require that succeed on all platforms before code can be checked in. Which you should probably do anyway.

They do that, but for the programmers it's still annoying (and a waste of time) to have patches rejected because some compiler on some platform behaves differently.